In this photo Vcc is yellow, GND is green, Data is red and Clock is black.
http://img17.imageshack.us/img17/7243/201101181933.jpg
For c. USART implementation:
- In case of Teensny(ATMega32u4) CLock is on PD2 and Data on PD5.
+ In case of Teensny(ATMega32u4) CLock is on PD5 and Data on PD2.
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